A review of EDM Process for difficult to cut materials

V. L. Jagtap


Electrical discharge machining (EDM) is the process of removing material from a conductive work piece by applying a high-frequency pulsed, electrical current to it via a solid, shaped electrode or EDM wire. The electrode never touches the work piece but instead discharges its current through an insulating dielectric fluid (water or oil) across a very small spark gap upon voltage, amperage, electrode material, and it and dielectric type. The spark is plasma hot, and melts the work piece material before it. EDM is one of the earliest non-traditional machining processes. EDM process is based on thermoelectric energy between the work piece and an electrode. In electrical discharge machining (EDM), a process utilizing the removal phenomenon of electrical discharge in dielectric, the working fluid plays an important role affecting the material removal rate and the properties of the machined surface. Choosing the right dielectric fluid is critical for successful operations. The paper describes the review of EDM process for difficult to cut or hard materials


Electrode, dielectric fluid, non conventional machining etc.

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Sourabh Kumar Saha, “Experimental Investigation of the (Dry EDM) Process”, A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Technology. Department of Mechanical Engineering ,Indian Institute of Technology Kanpur, Kanpur 208016 (INDIA)( April 2008)


S. Chakraborty, V. Dey, S.K. Ghosh, A review on the use of dielectric fluids and their effects in electrical discharge machining characteristics, Precision Engineering 40 (2015) 1–6.

Kern R., Sinker dielectric fundamentals. EDM Today 2009. January/February issue.

Puri AB, Bhattacharyya B. An analysis and optimization of the geometrical inaccuracy due to wire lag phenomenon in WEDM. Int J Mach Tools Manuf2003;43(2):151–9.

Singh S, Bhardwaj A. Review to EDM by using water and powder-mixed dielectric fluid. J Miner Mater Charact Eng 2011;10(2):199–230.

Lok YK, Lee TC. Wire-cut electrical discharge machining of SIALON ceramics. In: Proc. Seventh Int. Manuf Conf. with China. 1995. p. 71–6.

Yan MT, Lai YP. Surface quality improvement of wire-EDM using a fine finish power supply. Int J Mach Tools Manuf 2007;47:1686–94.

Rajurkar KP, Yu ZY. 3D micro-EDM using CAD/CAM. Ann CIRP 2000;49(1):127–30.

Zhao WS, Meng QG, Wang ZL. The Q1application of research on powder mixed EDM in rough machining. J Mater Process Techno 2002;129:30–3.

Furutani K, Saneto A, Takezawa H, Mohri N, Miyake H. Accretion of titanium carbide by electrical discharge machining with powder suspended in working fluid. Precise Eng 2001;25:138–44.

Jeswani ML. Electrical discharge machining in distilled water. Wear1981;72:81–8.

Jeswani ML. Effect of addition of graphite powder to kerosene used as a dielectric fluid in electrical discharge machining. Wear 1981;70:133–9.


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